You should not have to take anyone's word for it. Compressor symptoms overlap with much cheaper faults — a failed capacitor or contactor can produce warm air, a breaker trip, or a unit that hums and will not start. Diagnostic testing distinguishes them, and given the cost difference that testing should always happen before a compressor is condemned. Ask what test result led to the conclusion.

Because compressors rarely fail spontaneously. A refrigerant leak, dirty condenser coils causing overheating, restricted airflow, or an electrical fault typically did the damage over time. Fit a new compressor into those same conditions and it faces exactly what killed the last one. Finding and correcting the cause is part of the job, not an extra.

It traps moisture and contaminants circulating in the refrigerant lines. A failed compressor typically sheds debris and contamination into the system, so the drier is replaced as standard during compressor work — otherwise the new compressor draws in what the old one left behind. Reusing the original drier is a shortcut worth asking about.

It depends on system age, warranty coverage, the cost comparison, refrigerant type, and overall equipment condition. On a relatively young system in otherwise sound condition, a compressor is usually the sensible repair. On an older system with multiple failing components — particularly one using a phased-down refrigerant — replacing everything often costs less across the years that follow.

Quite possibly. Compressors often carry longer manufacturer parts warranties than the rest of the system, sometimes ten years, so checking coverage before you pay for a part is worth doing. We check it as part of the evaluation. Documented maintenance history helps here, since undocumented service is a common reason claims are refused.

Largely, yes — because the things that kill compressors are the things maintenance checks. Refrigerant charge verification catches leaks before they starve the system, coil cleaning prevents the overheating that raises operating temperature, and electrical testing finds weak capacitors before they strain the motor. Each of those costs a small fraction of a compressor.